Someone who knows me about as well as anyone these days convinced me to binge watch the Netflix Original YOU.  I was initially dubious, but I ended up being quite impressed.  It’s based on the novel YOU by Caroline Kepnes, which I have not yet read, so I don’t know how much of the great writing is directly hers, or what was contributed by the two scriptwriters, but yeah…well done.
So after I watched the entire series in one sitting, I was discussing it with the Recommendette, who said, “Yeah…he really reminded me of you…he’s just so….”
I think the word you’re looking for is…
“…ruthless.”
So close.

N.P.: “Make Me Feel” – Janelle Monáe